How to convert an integer to ASCII character ?

[akarui.tomodachi@gmail.com]

What is the most easiest way to convert an integer value to ASCII
character format ?
I tried with sprintf(). It works.
Is there any other way to do that ?

Objective::
I like to convert an integer value of 3 and write into a string buffer.

What I did:
.....
.....
char myStr[];
int myInt = 3;
sprintf(myStr, %d,myInt);
.....
.....

Please comment.

[serrand]

Re: How to convert an integer to ASCII character ?

akarui.tomodach i@gmail.com wrote:[color=blue]
> What is the most easiest way to convert an integer value to ASCII
> character format ?
> I tried with sprintf(). It works.
> Is there any other way to do that ?
>
> Objective::
> I like to convert an integer value of 3 and write into a string buffer.
>
> What I did:
> ....
> ....
> char myStr[];
> int myInt = 3;
> sprintf(myStr, %d,myInt);
> ....
> ....
>
> Please comment.
>[/color]

#define DIGILEN log10 (MAX_INT) +2

char buf[DIGILEN];
sprintf(buf, "%d", int_var);

Xavier

[serrand]

Re: How to convert an integer to ASCII character ?

serrand wrote:[color=blue]
> akarui.tomodach i@gmail.com wrote:
>[color=green]
>> What is the most easiest way to convert an integer value to ASCII
>> character format ?
>> I tried with sprintf(). It works.
>> Is there any other way to do that ?
>>
>> Objective::
>> I like to convert an integer value of 3 and write into a string buffer.
>>
>> What I did:
>> ....
>> ....
>> char myStr[];
>> int myInt = 3;
>> sprintf(myStr, %d,myInt);
>> ....
>> ....
>>
>> Please comment.
>>[/color]
>
> #define DIGILEN log10 (MAX_INT) +2
>
> char buf[DIGILEN];
> sprintf(buf, "%d", int_var);
>
> Xavier[/color]

oops... sorry

#define DIGILEN (int)(log10 (MAX_INT) +3)

Your way seems to be the simpliest...

sprintf is doing the same job as printf : wheras printf outputs in stdin
sprintf outputs in its first argument, which have to be an allocated string

Xavier

[OJ]

Re: How to convert an integer to ASCII character ?

Maybe itoa could be used. But it's not a standard function.

[shichongdong]

Re: How to convert an integer to ASCII character ?

int i = 3;
char c = i + '0';

[Lew Pitcher]

Re: How to convert an integer to ASCII character ?

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shichongdong wrote:[color=blue]
> int i = 3;
> char c = i + '0';[/color]

???

int i = 300;
char c = i + '0' ; /* nope. not an ascii character */

- --
Lew Pitcher

Master Codewright & JOAT-in-training | GPG public key available on request
Registered Linux User #112576 (http://counter.li.org/)
Slackware - Because I know what I'm doing.
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[CBFalconer]

Re: How to convert an integer to ASCII character ?

akarui.tomodach i@gmail.com wrote:[color=blue]
>
> What is the most easiest way to convert an integer value to ASCII
> character format ?
> I tried with sprintf(). It works.
> Is there any other way to do that ?
>
> Objective::
> I like to convert an integer value of 3 and write into a string buffer.[/color]

#include <stdio.h>

/* ---------------------- */

static void putdecimal(unsi gned int v, char **s) {

if (v / 10) putdecimal(v/10, s);
*(*s)++ = (v % 10) + '0';
**s = '\0';
} /* putdecimal */

/* ---------------------- */

int main(void) {

char a[80];

char *t, *s = a;

t = s; putdecimal( 0, &t); puts(s);
t = s; putdecimal( 1, &t); puts(s);
t = s; putdecimal(-1, &t); puts(s);
t = s; putdecimal( 2, &t); puts(s);
t = s; putdecimal(23, &t); puts(s);
t = s; putdecimal(27, &t); puts(s);
return 0;
} /* main */

--
"If you want to post a followup via groups.google.c om, don't use
the broken "Reply" link at the bottom of the article. Click on
"show options" at the top of the article, then click on the
"Reply" at the bottom of the article headers." - Keith Thompson
More details at: <http://cfaj.freeshell. org/google/>
Also see <http://www.safalra.com/special/googlegroupsrep ly/>

[Thad Smith]

Re: How to convert an integer to ASCII character ?

akarui.tomodach i@gmail.com wrote:[color=blue]
> What is the most easiest way to convert an integer value to ASCII
> character format ?[/color]

Lew Pitcher wrote:[color=blue]
> shichongdong wrote:[color=green]
>>int i = 3;
>>char c = i + '0';[/color]
>
> ???
>
> int i = 300;
> char c = i + '0' ; /* nope. not an ascii character */[/color]

Interesting. Neither is the earlier code converting 3 guaranteed to
produce ASCII.

--
Thad

[Kenny McCormack]

Re: How to convert an integer to ASCII character ?

In article <j5SJf.7348$_D5 .487766@news20. bellglobal.com> ,
Lew Pitcher <lpitcher@sympa tico.ca> wrote:[color=blue]
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>Hash: SHA1
>
>shichongdong wrote:[color=green]
>> int i = 3;
>> char c = i + '0';[/color]
>
>???
>
> int i = 300;
> char c = i + '0' ; /* nope. not an ascii character */[/color]

The OP was asking how to do it with 3, not 300. You need to keep up.

[Martin Jørgensen]

Re: How to convert an integer to ASCII character ?

Lew Pitcher wrote:[color=blue]
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> shichongdong wrote:
>[color=green]
>>int i = 3;
>>char c = i + '0';[/color]
>
>
> ???
>
> int i = 300;
> char c = i + '0' ; /* nope. not an ascii character */[/color]

It works for single digits, right?


Best regards / Med venlig hilsen
Martin Jørgense

--
---------------------------------------------------------------------------
Home of Martin Jørgensen - http://www.martinjoergensen.dk

[stathis gotsis]

Re: How to convert an integer to ASCII character ?

"Martin Jørgensen" <unoder.spam@sp am.jay.net> wrote in message
news:pkrmc3-l14.ln1@news.td c.dk...[color=blue]
> Lew Pitcher wrote:[color=green]
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > shichongdong wrote:
> >[color=darkred]
> >>int i = 3;
> >>char c = i + '0';[/color]
> >
> >
> > ???
> >
> > int i = 300;
> > char c = i + '0' ; /* nope. not an ascii character */[/color]
>
> It works for single digits, right?[/color]

Assuming ASCII it does.

[Lew Pitcher]

Re: How to convert an integer to ASCII character ?

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stathis gotsis wrote:[color=blue]
> "Martin Jørgensen" <unoder.spam@sp am.jay.net> wrote in message
> news:pkrmc3-l14.ln1@news.td c.dk...[color=green]
>> Lew Pitcher wrote:[color=darkred]
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA1
>>>
>>> shichongdong wrote:
>>>
>>>> int i = 3;
>>>> char c = i + '0';
>>>
>>> ???
>>>
>>> int i = 300;
>>> char c = i + '0' ; /* nope. not an ascii character */[/color]
>> It works for single digits, right?[/color]
>
> Assuming ASCII it does.[/color]

Assuming any conforming C implementation, it does. The C standard guarantees it.

- --
Lew Pitcher

Master Codewright & JOAT-in-training | GPG public key available on request
Registered Linux User #112576 (http://counter.li.org/)
Slackware - Because I know what I'm doing.
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[Ben Pfaff]

Re: How to convert an integer to ASCII character ?

Lew Pitcher <lpitcher@sympa tico.ca> writes:
[color=blue]
> stathis gotsis wrote:[color=green]
>> "Martin Jxrgensen" <unoder.spam@sp am.jay.net> wrote in message
>> news:pkrmc3-l14.ln1@news.td c.dk...[color=darkred]
>>> Lew Pitcher wrote:
>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>> Hash: SHA1
>>>>
>>>> shichongdong wrote:
>>>>
>>>>> int i = 3;
>>>>> char c = i + '0';
>>>>
>>>> ???
>>>>
>>>> int i = 300;
>>>> char c = i + '0' ; /* nope. not an ascii character */
>>> It works for single digits, right?[/color]
>>
>> Assuming ASCII it does.[/color]
>
> Assuming any conforming C implementation, it does. The C
> standard guarantees it.[/color]

The C standard guarantees that decimal digits are sequential and
in the proper order. The C standard doesn't guarantee that the
execution character set is ASCII. The OP asked to convert an
integer value to *ASCII* character format specifically.

Here's a portable way to get a single ASCII digit: 48 + num.
--
int main(void){char p[]="ABCDEFGHIJKLM NOPQRSTUVWXYZab cdefghijklmnopq rstuvwxyz.\
\n",*q="kl BIcNBFr.NKEzjwC IxNJC";int i=sizeof p/2;char *strchr();int putchar(\
);while(*q){i+= strchr(p,*q++)-p;if(i>=(int)si zeof p)i-=sizeof p-1;putchar(p[i]\
);}return 0;}

[Flash Gordon]

Re: How to convert an integer to ASCII character ?

stathis gotsis wrote:[color=blue]
> "Martin Jørgensen" <unoder.spam@sp am.jay.net> wrote in message
> news:pkrmc3-l14.ln1@news.td c.dk...[color=green]
>> Lew Pitcher wrote:[color=darkred]
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA1
>>>
>>> shichongdong wrote:
>>>
>>>> int i = 3;
>>>> char c = i + '0';
>>>
>>> ???
>>>
>>> int i = 300;
>>> char c = i + '0' ; /* nope. not an ascii character */[/color]
>> It works for single digits, right?[/color]
>
> Assuming ASCII it does.[/color]

Assuming an implementation that conforms to the C standard it does,
whether it is ASCII or not. It's one of the few things the C standard
guarantees about the execution character set.
--
Flash Gordon
Living in interesting times.
Web site - http://home.flash-gordon.me.uk/
comp.lang.c posting guidlines and intro -

http://clc-wiki.net/wiki/Intro_to_clc

[stathis gotsis]

Re: How to convert an integer to ASCII character ?

"Flash Gordon" <spam@flash-gordon.me.uk> wrote in message
news:2ndnc3xp47 .ln2@news.flash-gordon.me.uk...[color=blue]
> stathis gotsis wrote:[color=green]
> > "Martin Jørgensen" <unoder.spam@sp am.jay.net> wrote in message
> > news:pkrmc3-l14.ln1@news.td c.dk...[color=darkred]
> >> Lew Pitcher wrote:
> >>> -----BEGIN PGP SIGNED MESSAGE-----
> >>> Hash: SHA1
> >>>
> >>> shichongdong wrote:
> >>>
> >>>> int i = 3;
> >>>> char c = i + '0';
> >>>
> >>> ???
> >>>
> >>> int i = 300;
> >>> char c = i + '0' ; /* nope. not an ascii character */
> >> It works for single digits, right?[/color]
> >
> > Assuming ASCII it does.[/color]
>
> Assuming an implementation that conforms to the C standard it does,
> whether it is ASCII or not. It's one of the few things the C standard
> guarantees about the execution character set.[/color]

I was not aware of that, thanks for the correction.